Aerobic-anaerobic cycling treatment fluidized bed reactor for landfill leachate

Abstract

The invention discloses a fluidized-bed reactor for landfill leachate aerobic and anaerobic cycle treatment. The fluidized-bed reactor comprises a reactor inner cylinder (8), a reactor outer cylinder (9) and a three-phase separator (10), wherein the reactor inner cylinder (8) is positioned at the lower end of the fluidized-bed reactor, the upper end of the reactor inner cylinder (8) is connected with a cone (11), the reactor outer cylinder (9) is composed of the peripheral space of the lower end reactor inner cylinder (8) and the cone (11) at the upper end, both the upper end and the lower end of the reactor outer cylinder (9) are communicated with the reactor inner cylinder (8). With the reactor, after entering the reactor inner cylinder, garbage waste water firstly sequentially enters an aerobic area, an anaerobic area and an anaerobic area, passes through a process similar to an inverted A2O technique, thereby achieving the effects of highly effective COD removal and nitrogen removal by simultaneous nitrification and denitrification, realizing advantages of cycle complementation in aerobic and anaerobic process, greatly simplifying technical procedures, saving covering area and investment cost and having low operation cost.

Description

technical field [0001] The invention belongs to waste water treatment, in particular to the treatment of landfill leachate. Background technique [0002] At present, about 93% of municipal solid waste in my country is disposed of by landfill. As time goes by, under the action of compaction and the biochemical action of microorganisms in these landfills, the pollutants contained in the landfill will dissolve with water and form landfill leachate together with rainfall. Since the composition of landfill waste in my country is much more complex than that in advanced countries, the composition of landfill leachate in my country is more complex, the pollution load is higher, and the treatment is more difficult. A small amount of landfill leachate will cause serious pollution to groundwater, surface water and the surrounding environment of landfills, directly threatening the safety of drinking water and industrial and agricultural water sources. [0003] Due to the extremely com...

AI Technical Summary

Problems solved by technology

[0006] (2) The water quality characteristics of leachate vary greatly

[0007] (3) The concentration of ammonia nitrogen in the leachate is high

When using traditional biological denitrification treatment, the treatment effect is not ideal

[0010] (6) Poor biodegradability of leachate from old landfills

[0011] (7) Expensive

However, these processes have problems such as high cost, large investment, serious membrane fouling, high yield of concentrated solution (close to about 30%) and intractability, which limit their general promotion and application.

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